Driving mechanism for machines for operating abrading or cutting tools.



No. 869,167. PATENTED OCT. 22. 1907.

' c. J. FANCHER.

DRIVING MECHANISM FOR MACHINES FOR OPERATING AB'RADING 0R CUTTING TOOLS. APPLICATION FILED APR. 10, 1905.

2 SHEETS-SHEET 2.

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CHARLES J. FANCHER, OF WEST GRANBY, CONNECTICUT, ASSIGNOR TO THE SIMPLEX MANUFACTURING COMPANY, OF NEW YORK, N. Y., A CORPORATIONOF CONNECTI- OUT.

DRIVING MECHANISM FOR MACHINES FOR OPERATING ABRADING- OB CUTTING TOOLS.

Specification of Letters Patent.

Patented Oct. 22, 1907'.

Original application filed April 22. 1904, Serial No. 204,306, Divided and this application filed April 10. 1905. Serial No. 254K707.

To all whom it may concern:

lie it: known that I, CHARLES ,l. Fnneunn, a citizen of the United States, residing at West Gra-nby, in the county of Hartford and State of onnecticut, have invented new and useful Driving Mechanism for Machines for Operating Abrai'ling or t utting Tools, of which the following is a specification, the same being a divisional part of my application for United States Letters Patent filed April 22, 1904, and serially rulinbored 204,306.

My invention relates to improvements in machines v for automatically operating files of different kinds and other tools, such as saws, which require a stroke substantially as long as the working portion of the tool in order to get the full benefit of and the best rcsultfrom the same, and said invention consists of certain peculiar driving mechanism [or the tool, as hereinafter set forth; and the objects of my invention are, first, to locate the driving mechanism, in a machine of the class specified, above the point where the work of the abrading or cutting tool is performed, which renders it aecessible and removes it beyond the range of dust or chips made by the tool; second, to produce a machine in which the tool is caused to perform its work on the down stroke, thereby decreasing the demand for a work holder, since there is less tendency to lift the work from the table, and obviating the turning of a bur over the mark or line to which the filing or cutting is to be done; third, to provide simple and effective mechanism, capable of adjustment for the accommodation of tools of different lengths. for imparting to the tool a slow and powerful down stroke and a quick and less powerful return; fourth, to construct mechanism parts comprising the driving mechanism when the tool is at the end of its up stroke; Fig. 3, a side view and partial section of the tool ram showing the method of fastening a file therein, and Fig. 4', an edge view of the driving disk and a sectional view of the adjustable bearing by means of which the driving rod is operatively connected with said disk.

Similar reference characters refer to similar parts throughout the several views.

Referring to the drawings it will be seen that 1 provide First a substantial supporting frame or standard 1 having a base 1 adapted to be fastened to a bench or other support. which parts carry all of the other members of the machine. springing from the head of the standard 1 is an upwardly and forwardly extending curved arm l and below this a forwardly extending arm 1 terminating in a sleeve or hearing l for the tool holding member or ram 2. A guide rod 3 is fixedly mounted in and between the arms I and it, behind the central vertical plane of the hearing if. A bracket 1, which affords a bearing l for the driving shaft at, extends rearwardly and laterally from the standard near the top and a stud 5 is fixed in one side of the head of said standard. A driving disk (5 is tight on the end of the shaft 4 adjacent the stud 5 and a speed pulley 7 is tight on the opposite end of said shaft, said pulley being directly or indirectly bolted to some suitable engine onmotor adapted to operate the actuating mechanism for the tool. A slide 8, mounted to move up and down freely on the guide rod, has its front part rigidly attached to the head of the ram A fulcrum bearing 9, for the driving rod 10, is mounted to rock on the stud 5 and consists of a double box member one part of which receives said stud and the other part receives said rod which is adapted to reciprocate therein, the two parts standing at right-angles to each other. The bearing 9 permits the rod 10 to both rock and reciprocate. The front end or head of the rod It) is pivoted at ll to the slide 8 and the tail of said rod is pperatively connected with the disk 6 by means of asecond bearing 9 and other members described below.

The adjustable connection between. the rear bearing 9 and the disk 6 is described as follows: Flanged lugs 12 are arranged on the face of the disk 6 to form a T-slot in which the angular head of a bolt :13 is inserted and through which the shank of said bolt extends. the longitudinal center of said slot corresponding with a radius of said disk. A flanged sleeve 14 is mounted on the protruding part of thebolt l3 with the flange against the outside faces of the lugs 12, the upper part of the bearing 9 is mounted on said sleeve, and a nut 15 is screwed onto the threaded end of said bolt. The sleeve 14 is slightly longer than the engaging part of the bearing hence the nut l5 crowds against the adjacent end of said sleeve, causes the flanged end of the latter and the head of the bolt l3 to firmly grasp the lips of the lugs l2, and holds the bearing in place without preventing the sleeve from turning therein. when carried around by the revolving disk. This bearing slidcsnpon the rod 10 which it actuates. By loosening the nut l5 the position of the bearing 9 may be changed by moving said bearing toward or away from the center of the disk. The disk may be countel-weighted opposite the lugs 12, as shown at 6*, to compensate for the latter.

In the drawings the tool shown is a tile 0 and it is attached to the base of the reciprocating tool carrying member or ram 2 by means of a collar 16 and set-screws 17l7 the tang of the file entering the passage 2 opening through the bottom of said ram. The collar 16 fits snugly around the base of the ram 2 and the set-screws 17 are in threaded engagement with the sides of oppositely disposed holes in said collar. These set-screws pass from the threaded openings in the collar 16 through corresponding plain openings in the sides of the ram 2 into the passage 2 and tightly grasp the tang oi the tile 0. The tile is firmly held in a perpendicular position when the end of the tang fits into the head of the passage 2 and the inner ends of the set-screws 17 are equidistant from the vertical center of the ram.

A strong and stiff connection between the ram 2 and the driving rod 10 is formed by the slide 8 which is iirmly attached to said ram and embraces the guide rod 3, the pivotal pin 11 being between the two last mentioned members. obviates undue vibration and strain at the operating point between driving rod and ram.

Assuming that the pulley 7 is rotated in the direction of the arrow (1, Figs. 1 and 2, it will be seen that the file 0 will be depressed by a comparatively slow motion and elevated by a comparatively rapid motion, through the medium of the shaft 4, disk 6, rod 10, bearings 9 and 9, slide 8 and ram 2, owing to the fact that the bearing 9 is farther away from the bearing 9 when the down stroke takes place than when the up stroke occurs. Provision is also made, by this arrangement and under the same natural law which governs levers, for imparting more force with the down stroke, when the tool does its work, than with the up stroke, when no work is done by the tool.

The stroke of a short tool should, of course, be less than that of a longer one, and vice versa, and the change in length of stroke imparted by this mechanism is .brought about by loosening the nut 15 and locating the bolt 13 nearer the center of the disk 6 to shorten the stroke and nearer the periphery of said disk to lengthen the stroke. In this manner any length of tool, within the capacity of the machine, may be successfully handled.

A vertically adjustable support 18, for the work table if), is shown, also an adjustable guide roller 2'7 for the file. Moreover, means are shown for the proper adjustment of the work table, but since such means together with the support 18, roller 27, etc., form the subject matter of the application hereinbei'ore referred to, it is not deemed necessary to describe them more This construction practically fully at this time; besides, such members may be omitted altogether and others substituted therefor, or onlya table or its equivalent may be employed in the same instance. It will be understood, of course, that the tool operates through an opening in the table, and that the thing being operated on by said tool rests upon or is held upon said table.

In practice, I prefer to introduce phosphor-bronze or other bushings into the bearings for certain of the rotary and reciprocating members, and to so construct all of the principal bearings and bearing members that whatever wear occurs may be compensated for by tightening such bearings and members.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination. in mechanism of the cla s specified. ol" :1 suitable supporting standard, an arm projecting therefrom. :1 hearing at the end of said arm, a tool holder mounted to reciprocate in said bearing, a bearing on the standard. a block 8 mounted on the tool holder and pro vidcd with a hearing at one side thereof, a guide rod 52 upon which said block bearing reciproeates, a driving rod 10 pivotally connected at one end with hiock S, driving mechanism in operative connection with the opposite end portion of said driving rod, said rod being mounted to reciprocate in said bearing on the standard, substantially as shown.

2. The combination, in a filing machine, of a standard 1. an arm l projecting therefrom, a tool holding member, said arm being provided with a bearing to receive said tool holding member and allow it to reciprocate therethrough. a guide rod Si mounted on said standard and provided with a sliding member 8. attached to one end 01 the tool holding member, a driving rod 10, a bearing 5) pivotally mounted on the standard and adapted to receive said driving rod, driving mechanism comprising a wheel. a piv otally mounted bearing mounted on one face oi. the driving wheel. said driving rod being arranged to pass through the bearing 9 pivotally mounted on the standard. and also through the hearing pivotally mounted on the driving wheel.

3. 'lhe combination, in mechanism of the class specified. ol :1 suitable supporting frame. a tool holding member mounted to reciprocate therein, a driving rod in operative connection at one end with the tool holding member. a pivetally mounted bearing iOi'dJliC driving rod, through which the driving rod is adapted to slide while the hearing CIIA RLES J". FANCHER.

Witnesses .T. M. S'ri .Xs. F. A. CUTTER. 

